CODEWITHSUNDEEP
androidandroid-lifecycle
Stillie
Stillie

Reputation: 2676

best place to add an action when application starts up or returns to the forground

I need my application to do 2 network calls when ever the app is started for the 1st time, when it has been killed and started again as well as when it has been placed in the background then returned.

I know I can put it in my "MainActivity" onCreate/onResume. I have a class that extends Application which is where I am initialising logging and crash reporting, but I noticed there is no onResume method, which from my understand is the method that is called when the application comes from the background.

Where would be the best place to do these 2 network calls to update certain aspects in my app when the app is started for the 1st time, started when killed and resumed when it comes back from the background.

FYI. The reason I don't want it to go in my "MainActivity" is that I don't want these network calls to be called when ever i return to the MainActivity from another screen in the app, only when the user returns to the app?

Thanks

Upvotes: 0

Views: 28

Answers (1)

Shaishav
Shaishav

Reputation: 5312

The use case of calling whenever the app returns from background is by implementing Activity Life Cycle methods in your Application class:

    public class myApp extends Application implements Application.ActivityLifecycleCallbacks {
    ...
    }

In this case you make sure that whenever an onPause() is called a corresponding onResume() should also be called (i.e. normal screen switching). If not, then you know that your app is now in background. The next callback to onResume() should mean that it has come to foreground again and you can make your network call.

Upvotes: 1

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